3 years ago

What value of x makes the equation true? 3x+21=8x-4

Mathematics

2 answers:

Luba_88 [7]3 years ago

5 0

3x+21=8x-4
3x-8+21=-4
3x-8x=-4-21
-5x=-4-21
-5x=-25
x=5

poizon [28]3 years ago

4 0

Answer:

x=5

Step-by-step explanation:

3 times 5= 15

15+21= 36

8 times 5 = 40

40-4=36

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